Hygrometer (which includes a Thermometer usually) or Thermometer (50mm diagonally) mount adapter.
Why do I need this?
High humidity is bad for some filaments during print.
Low ambient temperature is bad for layer adhesion for almost all filaments. Won't matter too much for PLA but it will be critical for sensitive stuff like ABS/ASA, Nylon, PC. Even PETG enjoys greater layer adhesion with higher ambient temperature.
Ideally you should preheat your printer, i.e. let it run idle with bed heated to 80-100C depending on whatever you are printing, let it raise the ambient heat in enclosure over 30C if you don't want to experience shrink and warp or cracks in your print.
Sharing the sample product I'm using below. This is only the adapter to mount. Seller is not an affiliate, just an example. I'm not selling any products or promoting.